package top.melody.ecommerce.common.util;

import org.apache.ibatis.ognl.IntHashMap;

import java.util.HashMap;
import java.util.Map;

/**
 * HTML and XML entities definitions
 * 
 * 
 * @see <a
 *      href="http://hotwired.lycos.com/webmonkey/reference/special_characters/">ISO
 *      Entities</a>
 * @see <a href="http://www.w3.org/TR/REC-html32#latin1">HTML 3.2 Character
 *      Entities for ISO Latin-1</a>
 * @see <a href="http://www.w3.org/TR/REC-html40/sgml/entities.html">HTML 4.0
 *      Character entity references</a>
 * @see <a href="http://www.w3.org/TR/html401/charset.html#h-5.3">HTML 4.01
 *      Character References</a>
 * @see <a href="http://www.w3.org/TR/html401/charset.html#code-position">HTML
 *      4.01 Code positions</a>
 * @author gonghaigang
 *
 */
public class HTMLEntities {

	private static final String[][] BASIC_SET = { { "quot", "34" }, // " -
																	// double-quote
			{ "amp", "38" }, // & - ampersand
			{ "lt", "60" }, // < - less-than
			{ "gt", "62" }, // > - greater-than
	};


	private static final String[][] APOS_SET = { { "apos", "39" }, // XML
																	// apostrophe
	};

	private static final String[][] ISO_8859_1_SET = { { "nbsp", "160" }, // non-breaking
																			// space
			{ "iexcl", "161" }, // inverted exclamation mark
			{ "cent", "162" }, // cent sign
			{ "pound", "163" }, // pound sign
			{ "curren", "164" }, // currency sign
			{ "yen", "165" }, // yen sign = yuan sign
			{ "brvbar", "166" }, // broken bar = broken vertical bar
			{ "sect", "167" }, // section sign
			{ "uml", "168" }, // diaeresis = spacing diaeresis
			{ "copy", "169" }, // ? - copyright sign
			{ "ordf", "170" }, // feminine ordinal indicator
			{ "laquo", "171" }, // left-pointing double angle quotation mark =
								// left pointing guillemet
			{ "not", "172" }, // not sign
			{ "shy", "173" }, // soft hyphen = discretionary hyphen
			{ "reg", "174" }, // ? - registered trademark sign
			{ "macr", "175" }, // macron = spacing macron = overline = APL
								// overbar
			{ "deg", "176" }, // degree sign
			{ "plusmn", "177" }, // plus-minus sign = plus-or-minus sign
			{ "sup2", "178" }, // superscript two = superscript digit two =
								// squared
			{ "sup3", "179" }, // superscript three = superscript digit three =
								// cubed
			{ "acute", "180" }, // acute accent = spacing acute
			{ "micro", "181" }, // micro sign
			{ "para", "182" }, // pilcrow sign = paragraph sign
			{ "middot", "183" }, // middle dot = Georgian comma = Greek middle
									// dot
			{ "cedil", "184" }, // cedilla = spacing cedilla
			{ "sup1", "185" }, // superscript one = superscript digit one
			{ "ordm", "186" }, // masculine ordinal indicator
			{ "raquo", "187" }, // right-pointing double angle quotation mark =
								// right pointing guillemet
			{ "frac14", "188" }, // vulgar fraction one quarter = fraction one
									// quarter
			{ "frac12", "189" }, // vulgar fraction one half = fraction one half
			{ "frac34", "190" }, // vulgar fraction three quarters = fraction
									// three quarters
			{ "iquest", "191" }, // inverted question mark = turned question
									// mark
			{ "Agrave", "192" }, // ? - uppercase A, grave accent
			{ "Aacute", "193" }, // ? - uppercase A, acute accent
			{ "Acirc", "194" }, // ? - uppercase A, circumflex accent
			{ "Atilde", "195" }, // ? - uppercase A, tilde
			{ "Auml", "196" }, // ? - uppercase A, umlaut
			{ "Aring", "197" }, // ? - uppercase A, ring
			{ "AElig", "198" }, // ? - uppercase AE
			{ "Ccedil", "199" }, // ? - uppercase C, cedilla
			{ "Egrave", "200" }, // ? - uppercase E, grave accent
			{ "Eacute", "201" }, // ? - uppercase E, acute accent
			{ "Ecirc", "202" }, // ? - uppercase E, circumflex accent
			{ "Euml", "203" }, // ? - uppercase E, umlaut
			{ "Igrave", "204" }, // ? - uppercase I, grave accent
			{ "Iacute", "205" }, // ? - uppercase I, acute accent
			{ "Icirc", "206" }, // ? - uppercase I, circumflex accent
			{ "Iuml", "207" }, // ? - uppercase I, umlaut
			{ "ETH", "208" }, // ? - uppercase Eth, Icelandic
			{ "Ntilde", "209" }, // ? - uppercase N, tilde
			{ "Ograve", "210" }, // ? - uppercase O, grave accent
			{ "Oacute", "211" }, // ? - uppercase O, acute accent
			{ "Ocirc", "212" }, // ? - uppercase O, circumflex accent
			{ "Otilde", "213" }, // ? - uppercase O, tilde
			{ "Ouml", "214" }, // ? - uppercase O, umlaut
			{ "times", "215" }, // multiplication sign
			{ "Oslash", "216" }, // ? - uppercase O, slash
			{ "Ugrave", "217" }, // ? - uppercase U, grave accent
			{ "Uacute", "218" }, // ? - uppercase U, acute accent
			{ "Ucirc", "219" }, // ? - uppercase U, circumflex accent
			{ "Uuml", "220" }, // ? - uppercase U, umlaut
			{ "Yacute", "221" }, // ? - uppercase Y, acute accent
			{ "THORN", "222" }, // ? - uppercase THORN, Icelandic
			{ "szlig", "223" }, // ? - lowercase sharps, German
			{ "agrave", "224" }, // ? - lowercase a, grave accent
			{ "aacute", "225" }, // ? - lowercase a, acute accent
			{ "acirc", "226" }, // ? - lowercase a, circumflex accent
			{ "atilde", "227" }, // ? - lowercase a, tilde
			{ "auml", "228" }, // ? - lowercase a, umlaut
			{ "aring", "229" }, // ? - lowercase a, ring
			{ "aelig", "230" }, // ? - lowercase ae
			{ "ccedil", "231" }, // ? - lowercase c, cedilla
			{ "egrave", "232" }, // ? - lowercase e, grave accent
			{ "eacute", "233" }, // ? - lowercase e, acute accent
			{ "ecirc", "234" }, // ? - lowercase e, circumflex accent
			{ "euml", "235" }, // ? - lowercase e, umlaut
			{ "igrave", "236" }, // ? - lowercase i, grave accent
			{ "iacute", "237" }, // ? - lowercase i, acute accent
			{ "icirc", "238" }, // ? - lowercase i, circumflex accent
			{ "iuml", "239" }, // ? - lowercase i, umlaut
			{ "eth", "240" }, // ? - lowercase eth, Icelandic
			{ "ntilde", "241" }, // ? - lowercase n, tilde
			{ "ograve", "242" }, // ? - lowercase o, grave accent
			{ "oacute", "243" }, // ? - lowercase o, acute accent
			{ "ocirc", "244" }, // ? - lowercase o, circumflex accent
			{ "otilde", "245" }, // ? - lowercase o, tilde
			{ "ouml", "246" }, // ? - lowercase o, umlaut
			{ "divide", "247" }, // division sign
			{ "oslash", "248" }, // ? - lowercase o, slash
			{ "ugrave", "249" }, // ? - lowercase u, grave accent
			{ "uacute", "250" }, // ? - lowercase u, acute accent
			{ "ucirc", "251" }, // ? - lowercase u, circumflex accent
			{ "uuml", "252" }, // ? - lowercase u, umlaut
			{ "yacute", "253" }, // ? - lowercase y, acute accent
			{ "thorn", "254" }, // ? - lowercase thorn, Icelandic
			{ "yuml", "255" }, // ? - lowercase y, umlaut
	};

	private static final String[][] HTML40_SET = { { "fnof", "402" }, // latin
																		// small
																		// f
																		// with
																		// hook
																		// =
																		// function=
																		// florin,
																		// U+0192
																		// ISOtech
			{ "Alpha", "913" }, // greek capital letter alpha, U+0391
			{ "Beta", "914" }, // greek capital letter beta, U+0392
			{ "Gamma", "915" }, // greek capital letter gamma,U+0393 ISOgrk3
			{ "Delta", "916" }, // greek capital letter delta,U+0394 ISOgrk3
			{ "Epsilon", "917" }, // greek capital letter epsilon, U+0395
			{ "Zeta", "918" }, // greek capital letter zeta, U+0396
			{ "Eta", "919" }, // greek capital letter eta, U+0397
			{ "Theta", "920" }, // greek capital letter theta,U+0398 ISOgrk3
			{ "Iota", "921" }, // greek capital letter iota, U+0399
			{ "Kappa", "922" }, // greek capital letter kappa, U+039A
			{ "Lambda", "923" }, // greek capital letter lambda,U+039B ISOgrk3
			{ "Mu", "924" }, // greek capital letter mu, U+039C
			{ "Nu", "925" }, // greek capital letter nu, U+039D
			{ "Xi", "926" }, // greek capital letter xi, U+039E ISOgrk3
			{ "Omicron", "927" }, // greek capital letter omicron, U+039F
			{ "Pi", "928" }, // greek capital letter pi, U+03A0 ISOgrk3
			{ "Rho", "929" }, // greek capital letter rho, U+03A1
			{ "Sigma", "931" }, // greek capital letter sigma,U+03A3 ISOgrk3
			{ "Tau", "932" }, // greek capital letter tau, U+03A4
			{ "Upsilon", "933" }, // greek capital letter upsilon,U+03A5 ISOgrk3
			{ "Phi", "934" }, // greek capital letter phi,U+03A6 ISOgrk3
			{ "Chi", "935" }, // greek capital letter chi, U+03A7
			{ "Psi", "936" }, // greek capital letter psi,U+03A8 ISOgrk3
			{ "Omega", "937" }, // greek capital letter omega,U+03A9 ISOgrk3
			{ "alpha", "945" }, // greek small letter alpha,U+03B1 ISOgrk3
			{ "beta", "946" }, // greek small letter beta, U+03B2 ISOgrk3
			{ "gamma", "947" }, // greek small letter gamma,U+03B3 ISOgrk3
			{ "delta", "948" }, // greek small letter delta,U+03B4 ISOgrk3
			{ "epsilon", "949" }, // greek small letter epsilon,U+03B5 ISOgrk3
			{ "zeta", "950" }, // greek small letter zeta, U+03B6 ISOgrk3
			{ "eta", "951" }, // greek small letter eta, U+03B7 ISOgrk3
			{ "theta", "952" }, // greek small letter theta,U+03B8 ISOgrk3
			{ "iota", "953" }, // greek small letter iota, U+03B9 ISOgrk3
			{ "kappa", "954" }, // greek small letter kappa,U+03BA ISOgrk3
			{ "lambda", "955" }, // greek small letter lambda,U+03BB ISOgrk3
			{ "mu", "956" }, // greek small letter mu, U+03BC ISOgrk3
			{ "nu", "957" }, // greek small letter nu, U+03BD ISOgrk3
			{ "xi", "958" }, // greek small letter xi, U+03BE ISOgrk3
			{ "omicron", "959" }, // greek small letter omicron, U+03BF NEW
			{ "pi", "960" }, // greek small letter pi, U+03C0 ISOgrk3
			{ "rho", "961" }, // greek small letter rho, U+03C1 ISOgrk3
			{ "sigmaf", "962" }, // greek small letter final sigma,U+03C2
									// ISOgrk3
			{ "sigma", "963" }, // greek small letter sigma,U+03C3 ISOgrk3
			{ "tau", "964" }, // greek small letter tau, U+03C4 ISOgrk3
			{ "upsilon", "965" }, // greek small letter upsilon,U+03C5 ISOgrk3
			{ "phi", "966" }, // greek small letter phi, U+03C6 ISOgrk3
			{ "chi", "967" }, // greek small letter chi, U+03C7 ISOgrk3
			{ "psi", "968" }, // greek small letter psi, U+03C8 ISOgrk3
			{ "omega", "969" }, // greek small letter omega,U+03C9 ISOgrk3
			{ "thetasym", "977" }, // greek small letter theta symbol,U+03D1 NEW
			{ "upsih", "978" }, // greek upsilon with hook symbol,U+03D2 NEW
			{ "piv", "982" }, // greek pi symbol, U+03D6 ISOgrk3
			{ "bull", "8226" }, // bullet = black small circle,U+2022 ISOpub
			{ "hellip", "8230" }, // horizontal ellipsis = three dot
									// leader,U+2026 ISOpub
			{ "prime", "8242" }, // prime = minutes = feet, U+2032 ISOtech
			{ "Prime", "8243" }, // double prime = seconds = inches,U+2033
									// ISOtech
			{ "oline", "8254" }, // overline = spacing overscore,U+203E NEW
			{ "frasl", "8260" }, // fraction slash, U+2044 NEW
			{ "weierp", "8472" }, // script capital P = power set= Weierstrass
									// p, U+2118 ISOamso
			{ "image", "8465" }, // blackletter capital I = imaginary
									// part,U+2111 ISOamso
			{ "real", "8476" }, // blackletter capital R = real part
								// symbol,U+211C ISOamso
			{ "trade", "8482" }, // trade mark sign, U+2122 ISOnum
			{ "alefsym", "8501" }, // alef symbol = first transfinite
									// cardinal,U+2135 NEW
			{ "larr", "8592" }, // leftwards arrow, U+2190 ISOnum
			{ "uarr", "8593" }, // upwards arrow, U+2191 ISOnum
			{ "rarr", "8594" }, // rightwards arrow, U+2192 ISOnum
			{ "darr", "8595" }, // downwards arrow, U+2193 ISOnum
			{ "harr", "8596" }, // left right arrow, U+2194 ISOamsa
			{ "crarr", "8629" }, // downwards arrow with corner leftwards=
									// carriage return, U+21B5 NEW
			{ "lArr", "8656" }, // leftwards double arrow, U+21D0 ISOtech
			{ "uArr", "8657" }, // upwards double arrow, U+21D1 ISOamsa
			{ "rArr", "8658" }, // rightwards double arrow,U+21D2 ISOtech
			{ "dArr", "8659" }, // downwards double arrow, U+21D3 ISOamsa
			{ "hArr", "8660" }, // left right double arrow,U+21D4 ISOamsa
			{ "forall", "8704" }, // for all, U+2200 ISOtech
			{ "part", "8706" }, // partial differential, U+2202 ISOtech
			{ "exist", "8707" }, // there exists, U+2203 ISOtech
			{ "empty", "8709" }, // empty set = null set = diameter,U+2205
									// ISOamso
			{ "nabla", "8711" }, // nabla = backward difference,U+2207 ISOtech
			{ "isin", "8712" }, // element of, U+2208 ISOtech
			{ "notin", "8713" }, // not an element of, U+2209 ISOtech
			{ "ni", "8715" }, // contains as member, U+220B ISOtech
			{ "prod", "8719" }, // n-ary product = product sign,U+220F ISOamsb
			{ "sum", "8721" }, // n-ary sumation, U+2211 ISOamsb
			{ "minus", "8722" }, // minus sign, U+2212 ISOtech
			{ "lowast", "8727" }, // asterisk operator, U+2217 ISOtech
			{ "radic", "8730" }, // square root = radical sign,U+221A ISOtech
			{ "prop", "8733" }, // proportional to, U+221D ISOtech
			{ "infin", "8734" }, // infinity, U+221E ISOtech
			{ "ang", "8736" }, // angle, U+2220 ISOamso
			{ "and", "8743" }, // logical and = wedge, U+2227 ISOtech
			{ "or", "8744" }, // logical or = vee, U+2228 ISOtech
			{ "cap", "8745" }, // intersection = cap, U+2229 ISOtech
			{ "cup", "8746" }, // union = cup, U+222A ISOtech
			{ "int", "8747" }, // integral, U+222B ISOtech
			{ "there4", "8756" }, // therefore, U+2234 ISOtech
			{ "sim", "8764" }, // tilde operator = varies with = similar
								// to,U+223C ISOtech
			{ "cong", "8773" }, // approximately equal to, U+2245 ISOtech
			{ "asymp", "8776" }, // almost equal to = asymptotic to,U+2248
									// ISOamsr
			{ "ne", "8800" }, // not equal to, U+2260 ISOtech
			{ "equiv", "8801" }, // identical to, U+2261 ISOtech
			{ "le", "8804" }, // less-than or equal to, U+2264 ISOtech
			{ "ge", "8805" }, // greater-than or equal to,U+2265 ISOtech
			{ "sub", "8834" }, // subset of, U+2282 ISOtech
			{ "sup", "8835" }, // superset of, U+2283 ISOtech
			{ "sube", "8838" }, // subset of or equal to, U+2286 ISOtech
			{ "supe", "8839" }, // superset of or equal to,U+2287 ISOtech
			{ "oplus", "8853" }, // circled plus = direct sum,U+2295 ISOamsb
			{ "otimes", "8855" }, // circled times = vector product,U+2297
									// ISOamsb
			{ "perp", "8869" }, // up tack = orthogonal to =
								// perpendicular,U+22A5 ISOtech
			{ "sdot", "8901" }, // dot operator, U+22C5 ISOamsb
			{ "lceil", "8968" }, // left ceiling = apl upstile,U+2308 ISOamsc
			{ "rceil", "8969" }, // right ceiling, U+2309 ISOamsc
			{ "lfloor", "8970" }, // left floor = apl downstile,U+230A ISOamsc
			{ "rfloor", "8971" }, // right floor, U+230B ISOamsc
			{ "lang", "9001" }, // left-pointing angle bracket = bra,U+2329
								// ISOtech
			{ "rang", "9002" }, // right-pointing angle bracket = ket,U+232A
								// ISOtech
			{ "loz", "9674" }, // lozenge, U+25CA ISOpub
			{ "spades", "9824" }, // black spade suit, U+2660 ISOpub
			{ "clubs", "9827" }, // black club suit = shamrock,U+2663 ISOpub
			{ "hearts", "9829" }, // black heart suit = valentine,U+2665 ISOpub
			{ "diams", "9830" }, // black diamond suit, U+2666 ISOpub
			{ "OElig", "338" }, // latin capital ligature OE,U+0152 ISOlat2
			{ "oelig", "339" }, // latin small ligature oe, U+0153 ISOlat2
			{ "Scaron", "352" }, // latin capital letter S with caron,U+0160
									// ISOlat2
			{ "scaron", "353" }, // latin small letter s with caron,U+0161
									// ISOlat2
			{ "Yuml", "376" }, // latin capital letter Y with diaeresis,U+0178
								// ISOlat2
			{ "circ", "710" }, // modifier letter circumflex accent,U+02C6
								// ISOpub
			{ "tilde", "732" }, // small tilde, U+02DC ISOdia
			{ "ensp", "8194" }, // en space, U+2002 ISOpub
			{ "emsp", "8195" }, // em space, U+2003 ISOpub
			{ "thinsp", "8201" }, // thin space, U+2009 ISOpub
			{ "zwnj", "8204" }, // zero width non-joiner,U+200C NEW RFC 2070
			{ "zwj", "8205" }, // zero width joiner, U+200D NEW RFC 2070
			{ "lrm", "8206" }, // left-to-right mark, U+200E NEW RFC 2070
			{ "rlm", "8207" }, // right-to-left mark, U+200F NEW RFC 2070
			{ "ndash", "8211" }, // en dash, U+2013 ISOpub
			{ "mdash", "8212" }, // em dash, U+2014 ISOpub
			{ "lsquo", "8216" }, // left single quotation mark,U+2018 ISOnum
			{ "rsquo", "8217" }, // right single quotation mark,U+2019 ISOnum
			{ "sbquo", "8218" }, // single low-9 quotation mark, U+201A NEW
			{ "ldquo", "8220" }, // left double quotation mark,U+201C ISOnum
			{ "rdquo", "8221" }, // right double quotation mark,U+201D ISOnum
			{ "bdquo", "8222" }, // double low-9 quotation mark, U+201E NEW
			{ "dagger", "8224" }, // dagger, U+2020 ISOpub
			{ "Dagger", "8225" }, // double dagger, U+2021 ISOpub
			{ "permil", "8240" }, // per mille sign, U+2030 ISOtech
			{ "lsaquo", "8249" }, // single left-pointing angle quotation
									// mark,U+2039 ISO proposed
			{ "rsaquo", "8250" }, // single right-pointing angle quotation
									// mark,U+203A ISO proposed
			{ "euro", "8364" }, // euro sign, U+20AC NEW
	};


	public static final HTMLEntities XML;


	public static final HTMLEntities HTML32;


	public static final HTMLEntities HTML40;

	/**
	 * 初始化预定义的实体集。
	 */
	static {
		XML = new HTMLEntities();
		XML.addEntities(BASIC_SET);
		XML.addEntities(APOS_SET);

		HTML32 = new HTMLEntities();
		HTML32.addEntities(BASIC_SET);
		HTML32.addEntities(ISO_8859_1_SET);

		HTML40 = new HTMLEntities();
		HTML40.addEntities(BASIC_SET);
		HTML40.addEntities(ISO_8859_1_SET);
		HTML40.addEntities(HTML40_SET);
	}

	/** 快速查找表的大小。 */
	private static final int LOOKUP_TABLE_SIZE = 256;

	private Map<String,Integer> entityNameToValue = new HashMap<String,Integer>();
	private IntHashMap entityValueToName = new IntHashMap();
	private String[] lookupTable;

	public void addEntities(String[][] entitySet) {
		for (int i = 0; i < entitySet.length; ++i) {
			addEntity(entitySet[i][0], Integer.parseInt(entitySet[i][1]));
		}
	}

	public void addEntity(String name, int value) {
		entityNameToValue.put(name, new Integer(value));
		entityValueToName.put(value, name);

		// 更新查找表
		if ((value < LOOKUP_TABLE_SIZE) && (lookupTable != null)) {
			lookupTable[value] = name;
		}
	}

	public String getEntityName(int value) {
		if (value < LOOKUP_TABLE_SIZE) {
			if (lookupTable == null) {
				lookupTable = new String[LOOKUP_TABLE_SIZE];

				for (int i = 0; i < LOOKUP_TABLE_SIZE; ++i) {
					lookupTable[i] = (String) entityValueToName.get(i);
				}
			}

			return lookupTable[value];
		}

		return (String) entityValueToName.get(value);
	}


	public int getEntityValue(String name) {
		Object value = entityNameToValue.get(name);

		if (value == null) {
			return -1;
		}

		return ((Integer) value).intValue();
	}
}
